is it possible to post to the wall (using the graph api) when the user is not authenticated into Facebook? I tried replacing the me in FB.api('/me/feed/', 'post'... with the user id, but it didn’t work. Quora is able to post a message on my fb wall even when I am logged out of FB.
is it possible to post to the wall (using the graph api) when the
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You can, but you need the user to grant you the offline_access permission.
This is from Facebook documentation:
Enables your application to perform authorized requests on behalf of the user at any time. By default, most access tokens expire after a short time period to ensure applications only make requests on behalf of the user when the are actively using the application. This permission makes the access token returned by our OAuth endpoint long-lived.